Last time I checked it was a stereo 3.5mm male connector with tip = bias,
ring = signal and sleeve = ground. But I may be wrong.

On Fri, 17 May 2002, Rex Byrns wrote:

>I have lost the link and printout of a nice little preamp cable to use on a
>PC microphone jack.  It is good for attaching sensors (geophones, etc)
>
>The handy part about the information was the different types and polarities
>of microphone inputs.
>
>If anyone knows the address or has a copy I would appreciate it.
>
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